| Starter | Tm | Tier | Game |
|---|---|---|---|
| Chuck Finley | ANA | 7.77 | 199008220_ANA_DET |
| Ed Whitson | SDN | 5.26 | 199008210_NYN_SDN |
| Danny Darwin | HOU | 4.3 | 199008210_HOU_PIT |
| Frank Viola | NYN | 4.16 | 199008220_NYN_SDN |
| Bill Swift | SEA | 3.15 | 199008220_SEA_TEX |
| Starter | Tm | Tier | Game |
|---|---|---|---|
| Andy Hawkins | NYA | -4.36 | 199008220_TOR_NYA |
| Jack Morris | DET | -4.05 | 199008220_ANA_DET |
| Jaime Navarro | MIL | -2.35 | 199008230_MIL_NYA |
| John Cerutti | TOR | -0.7 | 199008220_TOR_NYA |
| Rick Mahler | CIN | -0.65 | 199008210_CHN_CIN |
Based on accumulated WAA for this season up to 1990-08-23.
| Rank | WAA | Name | IP | Tm |
|---|---|---|---|---|
| +001+ | 8.88 | Roger Clemens | 199 | BOS |
| +006+ | 6.25 | Dave Stewart | 207 | OAK |
| +007+ | 6 | Ed Whitson | 183 | SDN |
| +008+ | 5.89 | Chuck Finley | 182.3 | ANA |
| +009+ | 5.48 | Danny Darwin | 115.3 | HOU |
| +011+ | 5.06 | Frank Viola | 182.3 | NYN |
| +018+ | 4.35 | Dennis Martinez | 189.7 | WAS |
| +022+ | 4.2 | Doug Drabek | 172.3 | PIT |
| +023+ | 4.18 | Bill Swift | 106.3 | SEA |
| +032+ | 3.76 | Norm Charlton | 105 | CIN |
| +035+ | 3.55 | Bob Welch | 181.7 | OAK |
| +036+ | 3.51 | Ramon Martinez | 174 | LAN |
| +045+ | 3.2 | Dave Stieb | 154.3 | TOR |
| +048+ | 3.13 | Greg Hibbard | 156.3 | CHA |
| +060+ | 2.89 | Bob Tewksbury | 104 | SLN |
| +064+ | 2.84 | Kevin Appier | 132 | KCA |
| +067+ | 2.79 | Tom Candiotti | 169 | CLE |
| +070+ | 2.51 | Randy Johnson | 171.3 | SEA |
| +071+ | 2.49 | Mark Gardner | 143 | WAS |
| +072+ | 2.49 | Oil Can Boyd | 145.3 | WAS |
| +073+ | 2.48 | Mike Morgan | 169.7 | LAN |
| +082+ | 2.26 | Zane Smith | 161.3 | TOT |
| +090+ | 2.14 | Kirk McCaskill | 133.7 | ANA |
| +096+ | 2 | Dave Wells | 131.7 | TOR |
| +102+ | 1.91 | Matt Young | 167 | SEA |
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